1. Cast surfaces have good finishing.
a) True
b) false
Explanation: Cavity is surrounded by sand and hence not good finish is obtained
2. In forging, metal is in which of the following stage
a) Elastic
b) Plastic
c) Can be in any stage
d) Rigid
Explanation: Forging is the working of metal in plastic range.
3. Forged components can be held between close limits.
a) True
b) false
Explanation: There is no shrinkage problems and hence less tolerances.
4. Among casting, forging and forging which has the slowest rate of production?
a) Casting
b) Forging
c) Machining
d) All have equal rate of production
Explanation: Machining each part is very time consuming.
5. In manual assembly, cost of screw is higher than the cost of driving a screw.
a) True
b) false
Explanation: Generally manufacturing screw is cheaper than driving it.
6. Maximum carbon content in welding is usually limited to
a) 0.22%
b) 0.8%
c) 0.5%
d) 2%
Explanation: With increase of carbon, welding becomes difficult as weld becomes susceptible to cracks.
7. Which of the following is not a classification of fit?
a) Clearance
b) Transition
c) Interference
d) Enjoining
Explanation: Simple classification of fits is down in 3 categories.
8. Which of the following always provides a positive clearance between the hole and the shaft over the entire range of tolerances?
a) Clearance
b) Transition
c) Interference
d) None of the mentioned
Explanation: Clearance positive imparts a positive clearance.
9. In this case, tolerance zone of hole is entirely below that of the shaft.
a) Clearance
b) Interference
c) Enjoining
d) Non of the mentioned
Explanation: Interference fit provides a positive clearance and hence tolerance zone of hole is below that of shaft.
10. Which of the following are true for system of tolerances to the shaft and the hole?
a) In hole-basis system, various shafts are associated with a single hole
b) In hole-basis system as well as shaft-basis system, various shafts are associated with multiple holes
c) In shaft-basis system, various shafts are associated with a single hole
d) None of the mentioned
Explanation: As per the standards.